Ukawa, Kiyoshi; Ishiguro, Toshihiro; Wada, Yoshikazu; Nohara, Akira published an article in Heterocycles. The title of the article was 《Synthesis of 5-oxo-5H-[1]benzopyrano[4,3-b]pyridine derivatives》.Product Details of 50743-32-3 The author mentioned the following in the article:
Oxobenzopyranopyridinecarboxamides I (R = H, Me, Et, Me2CH; R1 = H, Me) were synthesized by the reaction of oxobenzopyrancarbonitriles II with malonamide in the presence of NaOMe. Compounds I were also converted into carboxylic acids and tetrazole derivatives, some of which have antiallergic activity. The structures of I and their derivatives were confirmed by IR and NMR spectra and by X-ray crystallog. anal. The experimental part of the paper was very detailed, including the reaction process of 6-Isopropyl-4-oxo-4H-chromene-3-carbonitrile(cas: 50743-32-3Product Details of 50743-32-3)
6-Isopropyl-4-oxo-4H-chromene-3-carbonitrile(cas: 50743-32-3) belongs to nitriles. Nitriles are found in many useful compounds. Nitrile rubber is also widely used as automotive and other seals since it is resistant to fuels and oils. Organic compounds containing multiple nitrile groups are known as cyanocarbons.Product Details of 50743-32-3
Referemce:
Nitrile – Wikipedia,
Nitriles – Chemistry LibreTexts